I have textbox and two validation (RequiredFieldValidator & RegularExpressionValidator) as bellow

<asp:TextBox runat="server" ID="txtEmailFrom" CssClass="form-control"></asp:TextBox>
<asp:RequiredFieldValidator 
    ID="RequiredFieldValidator3" 
    runat="server" 
    ErrorMessage="Field Required" 
    ControlToValidate="txtEmailFrom" 
    Display="Dynamic"
    ForeColor="Red"></asp:RequiredFieldValidator>
<asp:RegularExpressionValidator 
    ID="regexEmailValid" 
    runat="server" 
    ValidationExpression="\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*" 
    ControlToValidate="txtEmailFrom" 
    ForeColor="Red"
    Display="Dynamic"
    ErrorMessage="Invalid Email Format"></asp:RegularExpressionValidator>

But with error I need the border of field to highlight with red. And for that the code bellow is written:

function ValidatorUpdateDisplay(val) {
        if (typeof (val.display) == "string") {
            if (val.display == "None") {
                return;
            }
            if (val.display == "Dynamic") {
                val.style.display = val.isvalid ? "none" : "inline";
                return;
            }
        }
        val.style.visibility = val.isvalid ? "hidden" : "visible";
        if (val.isvalid) {
            document.getElementById(val.controltovalidate).style.border = '1px solid #333';
        }
        else {
            document.getElementById(val.controltovalidate).style.border = '1px solid red';
        }
    }

The function is working only with RequiredFieldValidatior. I need to work with both (RequiredFieldValidator & RegularExpressionValidator) validation.

Thank you in advance.